License / Queue errors

I've just started testing the 3CX system and came accross two errors.
The system is installed on a Win2003 SP2 with IIS 6.0.

1. Error when entering license key for enhanced demo version
When I enter the license key that was sent by mail and click on the "update" button, I receive the following error :
"An exeption occurred Activate3Cx Error : Attempt to read or write on secure memory. Often, this points that other memory is damaged."

2. Cannot add a Call Queue
When configuring a call queue, I can not click the "OK" or "Apply" button to add the queue. These buttons are disabled.

Could someone please help me out on this one ?
We are currently using Linksys VOIP-systems, but are looking for a better alternative.